Without the use of an external electric current.(adjective)
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Use "electroless" in a sentence
"John Lazzeroni was the first in the pool with a coating called NP-3, which is a mixture of electroless nickel and Teflon."
"We're seeing a little bit of stress for example, in the electroless nickel going on to the hard drives just due to the stress in the notebook and the computer market."
"The studies will use electroless plating tools and chemical processes to produce lower-cost solar electric panels."